string小数点取后n位

java：

String calMax = dr.getString("calMax");
calMax =calMax.substring(0,calMax.lastIndexOf(".")+4);
mv.addObject("calMax",dr.getString("calMax"));

或jsp:

var calMax= ${calMax}.toFixed(3);

 

 

<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>

<fmt:formatDate value="${title.TESTTIME}" pattern="yyyy-MM-dd HH:mm:ss"/>